Body hoisting mechanism



Dec. 24, 1940. E. R. BARRETT BODY HOISTING MECHANISM Original Filed Aug. 24, 1936 4 Sheets-Sheet 1 INVENTOR Hit 4rd 2T .Barrai'i? BY M4 09 Ym,

A ORNEYS.

Dec. 24, 1940.

E. R. BARRETT BODY HOISTING MECHANISM 4 Sheets-Sheet 2 Original Filed Aug. 24, 1936 INVENTOR BY M A ORNEYS.

Dec. 24, 1940.- R BARRETT' 2,226,193

BODY HOIS'I'ING MECHANISM Original Filed Aug. 24, 1936 4 Sheets-Sheet 5 is 57 E Q INVENTOR z' fiyflrx 77.5%2 /655,

BY- W AT ORNEYS- Dec. 24, 1940. E. R. BARRETT 2,226,193

BODY HOISTING MECHANISM Original Filed Aug. 24, 1936 4 Sheets-Sheet 4 VINVENTOR y/ ae.

ORNEYS,

Patented Dec. 24, 1940 PATENT OFFICE I 2,226,193 BODY HOISTING MECHANISM Edward It.

Gar Wood Industrie Barrett, Detroit, Mich., assignor to s, Inc., Detroit, Mich., a

. corporation of Michigan Original application August 24, 1936, Serial No.

97,491. Divided and this application November 2, 1938, Serial No. 238,427

Claims.

This application is a division of applicant's prior copending application, Serial Number 97,491, flled August 24, .1936, now Patent No. 2,142,089, issued January 3, 1939.

6 My invention relatesto method and means for tilting a dump body, and particularly to a hydraulic hoist and the method and structure for connecting one end ofthe hoist to the body in a manner to. eliminate the twisting of the body during the tilting movement.

In the patent to L. S. Wood No. 2,034,544, issued March 17, 1936, and assigned to the asignee of the present invention, a support for spaced hydraulically actuated lifting devices is illustrated, described and claimed, certain features of which are embodied in the present invention and disclosure. An outboard support is formed by a pair of plates of triangular shape, two corners of the plate being secured to projections on the chassis frame of the vehicle, while a third corner provides pivotal support for one end of the hydraulic device. The outboard support for the hydraulic device provides a greater degree of stability to the dump body during and after the raising operation.

In practicing my present invention, I extend the inventive concept of the above mentioned patent by providing greater stability between the dump body and the hydraulic device by substantially eliminating the twist which occurs to the frame of the body when one side is loaded a greater amount than the other. When fluid is delivered to the hydraulic devices through a central conduit and'when the load in the body is evenly distributed, the volume of fluid entering each of the devices will be equal and there will be no tendency of the body to tilt laterally. When a greater load is disposed on one sideof the body than on the other, the pressure-s will attempt to equalize in the cylinders, causing a greater volume of fluid to enter one of the hydraulic devices than the other, resulting in the twisting of the frame'and body.

The invention is further novel in that a rigid coupling is provided between the fluid conduit and the cylinder head of the hydraulic device, which permits the hydraulic device to oscillate on its trunnion and at the same time effectively seal the passage for the fluid. An arcuate metal conductor is utilized which is connected into an element which is pivotally aligned with the trunnion of the hydraulic device. A spring is employed, along with the fluid pressure, for urging the ele- 55 ment in one direction against a seat. Withthis construction, the flexible conduit heretofore required is entirely eliminated.

Further. novelty is providedby the provision of means for preventing the tilting of the body when the chassis frame tilts due to the unleveliposition 6 v of the wheels and also, in some instances, due to the uneven loading of the body. This I accomplish by mounting the body on a bolster which is rigidly connected to the front end of the chassis frame by a torque tube, therear end of which rests upon the rear portion of the chassis frame in such manner that the bolster may tilt relative thereto. The longitudinally extending. torque tube will resist twisting when the rear portion of the chassis frame twists independent of its front end and, as a result, the bolster will remain sub.- stantially level. I Still further novelty of the invention embodies the use of hydraulic or other means for causing the :bolster to positively resist the tilting action of the chassis frame when the chassis frame becomes twisted. Hydraulic cylinders may be employed having the rams universally connected to the bolster on each side of the centerv line thereof and so interconnected through a valve that when the bolster becomes tilted due to the tilting of the chassis frame, fluid will be supplied to the cylinder on the low side so as to extend the ram and cause the bolster to assume substantially a horizontal position. This position may be controlled 3 by leveling means, so that irrespective of the amount of tilt produced in the chassis frame, the bolster, and therefore the body, will be retained substantially horizontal. Such apparatus would also be available in the presence of uneven loading to cause the bolster to always assume ahorizontal position inthe presence of an unbalanced load. 1

Accordingly, the main objects of myinvention are: to interconnect pairs of tubular extending 40 braces of a frame with plates which provide pivotal supports for one end of hydraulic tilting devices, to conduct a fluid through one of the tubular braces into the head of a cylinder, which is pivotally mounted, thereon by means of a solid arcuate conduit which is preferably made of. spring material; to connect a conduit to a pivotal element having a seating portion which engages a seat in the head of a hydraulicdevice; toseal the pivotal end of a conduit to a, seat, of a hydraulic device by the pressure of the fluid in combination with that of a spring; to provide a support for a'body which is independent of the chassis frame; to provide an independent support for a body which is connected to the chassis 555 frame through a torque tube to permit the tilting of the support independent of the chassis frame; to provide means for positively retaining a separate support for the body in a horizontal position independent of the angular position which the chassis frame may assume; to provide means for retaining a body level independent of the angular positions the chassis frame may assume; and, in general, to provide a support for a hydraulic device of a tiltable body, which prevents the body from twisting when being tilted, and which is simple in construction and economical to manufacture.

Other objects and features of novelty of my invention will be either specifically pointed out, or will become apparent when referring, for a better understanding of my invention, to the following description taken in conjunction with the accompanying drawings, wherein:

Figure l is a broken View of an automotive vehicle having a tiltable body thereon, which embodies the features of my invention;

Fig. 2 is an enlarged sectional View of the structure stated in Figure 1, taken on the line 22 thereof;

Fig. 3 is an enlarged broken view of the structure illustrated in Figure 2, as viewed from a position indicated by the line 3-3 thereof;

Fig. 4 is a sectional view of the structure illustrated in Figure 3, taken on the line 44 thereof;

Fig. 5 is an enlarged view, partly in section, of the structure illustrated in Figure 3, taken on the line 55 thereof;

Fig. 6 is a broken plan View of structure, similar to that of Figure 2, showing a further form which my invention may assume;

Fig. 7 is a reduced end View of the structure illustrated in Figure 6, with parts in level position;

Fig. 8 is a view of structure, similar to that illustrated in Figure '7, with the chassis frame in tilted position;

Fig. 9 is a view of structure, identical to that illustrated in Figure 6, showing, in addition thereto, a still further form which my invention may assume;

Fig. 10 is an enlarged broken View of the structure illustrated in Figure 6, with parts in section, as viewed from line I iJ-I 0 of Figure 6;

Fig. 11 is an enlarged broken sectional view of the structure illustrated in Figure 10, taken on the line ||l| thereof;

Fig. 12 is an enlarged end view of structure, identical to that illustrated in Figures 6, '7 and 8, showing in addition thereto, a still further form which my invention may assume; and

Fig. 13 is a sectional View of the valve illustrated in Figure 12.

In Fig. 1, I have illustrated a chassis frame ID of an automotive vehicle having mounted thereon a tiltable body II, which is supported on a body frame I2. The body H is herein illustrated as being a garbage type of enclosed body, commonly employed for hauling refuse. The body is of heavy construction and large capacity, requiring material effort to effect its tilting to dump the contents thereof.

The frame I2 is formed of longitudinally extending channel members I3, which are interconnected at their rear ends by a tubular element I4. The ends I5 of the tubular element |4 form trunnions engaged by the bearings provided on outwardly and upwardly extending brackets I6 secured to the rear end of the chassis frame Ill.

This connection between the ends l5 and the brackets I6 provides the pivot, about which the body II is tilted when the opposite end of the frame I2 is raised. The front end of the frame I2 is provided with a pair of tubular elements II which are similar to the tubular element I4 with the exception that they are ofsomewhat greater length, projecting a greater distance beyond the outer face of the channel members I3.

A pair of plates I8 is supported on the ends of the tubular elements IT in spaced relation to each other, a distance slightly greater than the maximum diameter of the hydraulic devices I9, which are disposed therebetween. The hydraulic devices I9 embody a plurality of telescoping cylinders 2 I, 22, 23 and 24, as illustrated in Figure 5, each one of which is projectable relative to the other to provide a maximum extension to the hydraulic devices. The innermost cylinder 24 is provided with an extension 25, having an aperture 26 therein, through which a pin 21 extends. The pin also extends through a pair of bosses 28, provided on either side of the extension 25 and through the plates 32 to provide a pivotal connection between the cylinder 24 and the frame I2. By supporting the ends of the hydraulic devices I9 on the tubular elements I I, the twisting of the frame I2 when being raised is substantially eliminated through the torsional resistance of the tubular elements I1. The tubular elements resist the twist which must occur to permit the channel element 3 to twist relative to each other.

A similar pair of tubular elements 3| are supported by brackets 30 to the side members of the chassis frame I 0, and extend in a similar manner beyond their outer surfaces to provide outboard supports. A pair of plates 32 is supported on the projecting ends of the tubular elements 3|, and have trunnions 33 upon which one end of the hydraulic ram I9 is pivotally supported. Suitable cross bracing elements 34 may be employed to interconnect the plates 32 to prevent them from spreading when a load is applied by the hydraulic device. In Figure 5, I have illustrated the spacing element 34 as embodying a tube 36, through which a bolt 35 extends. The plates 32 are drawn into position as spaced by the tubular element 35 when the bolt 35 is tightened.

By mounting the hydraulic devices on outboard bearings at the sides of the body and chassis frame, not only is more stability obtained, but more room is provided within the body than when the devices are otherwise mounted. The rear portion of the frame |2-is offset slightly from the front portion to provide clearance for the wheel housings, and this offset portion provides the spaces in which the hydraulic devices are mounted without reducing the area of useful load,

Referring more particularly to Figures 2, 3 and 4, the frontmost tubular element 3| is employed to conduct the fluid delivered thereto by a pipe 40. Arcuate conductors 4| are secured to the outboard extending portions of the tubular elements 3 I. The conductors 4| are preferably made of spring steel to embody a certain amount of resiliency. The opposite end of the conductor 4| is threaded into a valve 42 pivotally disposed in a head 43 of the hydraulic device l9, as illustrated more particularly in Figure 5. The valve 42 has a seat 44 which engages a seat 45 provided in the head when the boss 42 is urged to the right, as viewed in the figure. A spring 45, abutting against a plug 41, urges the boss 42 to the right and therefore upon itsseat 45. The fluid pressure in the systemiassists the spring in: forcing the seat 44on'to the seat '45, and: thereby-provides a greater sealing effect as the fluidpressure-in- 5 creases. During operation the valve 42- remains stationary while the hydraulic device [9 oscillates on itstrunnion 33, and thereby eliminates a flexible' tubular connection which heretofore was necessary. In case the'valve 42 is seizedand 10 prevented from turning, the resilient conductor 4 I may spring suifi-cientlyto permit the hydraulic device l9 to oscillate without damaging the conductor. o In Figure 6, I have illustrated fragmentarily a generally rectangular chassis frame 58 having a transverse bolster 5| rigidly secured to the rear end of a longitudinally extending, medially disposedtorque tube 52. The torque tube 52 is rigidly welded to the central portion of the bolster 5| and is journaled in and projects-through a sleeve 53 which is rigidly attached to the rear cross brace 54 of the chassis frame 58. The front end of the tube 52 by a bracket 55 is rigidly secured to the medial part of the frontmost laterally disposed tube 3 I, the ends of which are rigid- 1y secured to the chassis frames 58 by brackets 30. Suitable diagonally disposed bracing arms 56 encompass the torque tube 52 adjacent itsrear end and are secured to the bolster 5| near the ends thereof. This provides a stability to the bolster relative to the torque tube.

When the rear end of the chassis frame 58 is twisted or warped relative to the front end of the chassis frame, as shown in Fig. 8, the bolster 5| is maintained in a level or horizontal position due to its rigid attachment to the torque tube 52, which is journaled at its rear end on the rear cross member of-the chassis frame and rigidly attached to the tube 3| at its forward end. The

40 torque tube 52 resists torsional twisting and thereby maintains the bolster 5| substantially parallel to the tube 3|, which tube is connected to the chassis frame 58 adjacent its front end. The ends of the bolster 5| are provided with brackets 51 which pivotally engage the end of the tube |4 provided on the frame |3 which supports the body. The body may be raised about the pivots formed between the ends of the tube I4 and the brackets 51 while a resistance to tilting is offered to the body and the bolster by the torque tube when the chassis frame is tilted, as illustrated'in Figure 8. This resistance to tilt is aided materially by having the torque tube supported at itsfront end near the front end of the 55 chassis frame since the weaving of the chassis frame occurs substantially from a central point so that the support on the frontmost tube 3| will not be afiected by the tilting or warping which occurs at the rear end of the chassis frame.

Since the front portion of the chassis frame which supports the tube 3| is not tilted, the inherent resistance of the tube 52 to twist will prevent the bolster 5| from tilting materially when the rear end of the chassis frame is tilted. The

normal position of the chassis frame and bolster is illustrated in Figure '7, while the tilted relation thereof will be noted in Figure 8, as pointed out hereinabove.

A further novelty is provided to the inventive concept as described and illustrated in Figures 6,

'7 and 8 by the addition of the hydraulic connection to the hoists [9, as illustrated in Figure 9. A power take-off device 60 drives a pair of independent pumps 6| and 62 which supply a uniform I volume of fluid to the hydraulic devices l9. The

may assume.

-fiuid-may be pumped from and returned to a "reservoir 63 and by accurately providing the same volume of loil to both of the cylinders, irrespectiv'e-..of theamount of weight which may be distributed-unevenly to one side or the other of the 5 body; the raising of the body will always occur withthe body in lateral horizontal position. .Thati isto say, the body will be prevented from tilting-"due touneven loading by the uniform supply of fluid to both of the cylinders. While .10

one cylinder may have a greater load applied thereto than the other, the extension of the rams of the cylinders will be uniform and tilting will thereby be prevented.

- In Figures 10 and '11, I have illustrated the 15 sleeve '53 as embodying an annular portion 64 having a stud 65 extending therefrom providing a structure in the nature of an eye bolt. The stud is suported on the flange 66 of the cross member 54 of the chassis frame with the sleeve 53 resting -20 'ona dish-shaped bracket 61 which is bolted or otherwise secured to the upper surface of the flange 66. A resilient annular element 68, here- 'in illustrated as being made of rubber, surrounds thestud 65 and is secured by a nut 69 threaded 25 onthe lower end of the stud 65 so as to cause the elements 68 to bear against the under side of the flange 66. In this construction, the torque tube resilient through the employment of the element 68. The sleeve is therefore mounted universally 35 for a small movement to permit the complete flexing of the chassis frame independent of the torque tube 52 and the bolster 5 Referring to Figures 12 and 13, I have illustrated a still further form which my invention In the construction therein illustrated, the chassis frame, body frame, bolster, torque tube and connections are the same as illustrated in Figs. 6, 7 and 8. In this embodiment, however, a valve H has its casing 12 mounted 01145 the bolster 5| while the valve core 13 is free to turn therein. The valve core 13 has a shaft 14 extending therefrom to which the upper end of a pendulum I5 is rigidly attached. A pair of hydraulically actuated cylinders 16 are pivotally 50 supported by brackets 11 to the chassis frame 58. Piston rods 18, extending from the cylinders 16, have their outer ends pivotally secured by brackets 19 to the bolster 5|. Conduits 88 and 8| connect opposite ends of one of the cylinders 16 to 55 one side of the valve 1|, while conduits 82 and 83 connect opposite ends of the other cylinder 16 to the valve 1|. An intake conduit 84 supplies fluid to the valve, while a return conduit 85 conducts the fluid from the valve to a reservoir. 60

The valve 13 is provided with a plurality of vanes 86, 81, 88 and 89 which make sealing contact with the interior surface of the cylindrical bore of the valve casing Passageways 9| and 92 connect the supply conduit 84 with the under 65 side of the vanes 89 and 88, respectively. Between the vanes 81 and 88 and 86 and 89, return orifices 93 and 94 are provided, communicating through an orifice 95 with the return conduit 85.

When the bolster and chassis frame are in 70 horizontal position, the valve is in the position illustrated in Figure 13. In this position fluid flows through the conduit 84 through the orifices 9| and 92 into the conduits 82 and 88,.respectively, and into the lower end of the cylinders 16. 75

The fiuid provided above the piston will be exhausted through the conduits 83. and 8| into the orifices 94 and 93 and out through the exhaust conduit 85. When the bolster is tilted to the left, due to the uneven loading of the body or due to the tilting of the chassis frame, the housing 12 of the valve will be turned counter-clockwise, as viewed in Figure 13, causing the vane 81 to pass the mouth of the conduit 8| and the vane 88 to pass the mouth of the conduit 80. In this arrangement, fluid under pressure will be delivered to the under side of the piston of the cylinder, illustrated on the left as viewed in Figure 12, to cause an upward pressure to be provided between the bolster and the chassis frame. At the same time, fluid will be delivered into the conduit 8| and will be exhausted from the conduit 80 below the piston, in the cylinder 76 on the right hand side of the bolster, as viewed in Figure 12. In this arrangement, the bolster has an upward force provided thereto by the left hand cylinder while a downward force is provided thereto by the right hand cylinder to cause the bolster to rotate about the torque tube 52. When a vertical position is approached, the relation between the valve 53 and its casing 12 will be that illustrated in Figure 13, and further compensating action will terminate. When the body tends to tilt toward the right, as viewed in Figure 12, the opposite action of the cylinders will occur; that is to say, the right hand cylinder will tend to raise the bolster while the left hand cylinder will tend to lower the bolster, so that the body will tilt back in a counter-clockwise direction toward normal position.

It is to be understood that either structure can be employed to compensate for the tilting of the body, and that means other than hydraulic can be utilized for this purpose. Valves or other means may be employed between the chassis frame and body to control the leveling mechanism and prevent the tilting of the body when separation occurs between the chassis frame and body as the chassis frame tilts. It is to be understood that the simple hydraulic means embodying a pair of cylinders and a pendulum actuated valve is employed for the purpose of illustration, and that I do not desire to be limited only to such structure.

While I have described and illustrated several embodiments of my invention, it will be apparent to those skilled in the art that various changes, omissions, additions and substitutions may be made therein without, departing from the spirit and scope of my invention as set forth in the accompanying claims.

What is claimed is:

1. An automotive vehicle embodying a chassis frame, a body, a torque tube interconnecting said body and said chassis frame, said torque tube being secured to the chassis frame near the front end thereof and to the body near the rear end thereof, and means for pivotally supporting said tube on the rear end of said chassis frame.

2. An automotive vehicle embodying a chassis frame, a body, a torque tube interconnecting said body and said chassis frame, said torque tube being secured to the chassis frame near the front end thereof and to the body near the rear end thereof, and a universally movable bearing secured to the rear portion of said chassis frame through which said tube extends.

3. An automotive vehicle having a chassis frame, a torque tube having one end rigidly attached to said chassis frame adjacent one end thereof, means for pivotally mounting the other end of said torque tube on said chassis frame adjacent the other end thereof, and a body supporting bolster rigidly attached to the pivoted end of said torque tube.

4. An automotive vehicle having a chassis frame, a torque tube having one end rigidly attached to said chassis frame adjacent one end thereof, means for pivotally mounting the other end of said torque tube on said chassis frame adjacent the other end thereof, a body supporting bolster rigidly attached to the pivoted end of said torque tube, and a dump body pivotally mounted on said bolster.

5. An auto-motive vehicle having a chassis frame, a torque tube having one end pivotally,-

mounted on a longitudinally extending axis upon and adjacent to one end of said chassis frame,

means for rigidly attaching the other end of said torque tube to said chassis frame adjacent the other end thereof, and a body supporting bolster rigidly attached to the pivoted end of said torque tube whereby said bolster is urged by said torque tube to maintain a position in a plane substantially parallel to the plane of said chassis frame at the point of rigid attachment of said torque tube.v

EDWARD R. BARRETT. 

